Malicious PDF — malware analysis report

Static analysis result for SHA-256 9296311263e5d198…

MALICIOUS

PDF

39.7 KB Created: 2021-05-10 15:08:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bf6c944b3cc4033457d17c69d528f047 SHA-1: 5a8ffefcf69ea4b13bc136790a009d41d634ca53 SHA-256: 9296311263e5d198e41a4311e591e040507f096463cdf4134d413279a83f435a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to game hack generators and free Robux sites, which are common lures for phishing and malware distribution. The primary malicious link redirects to a known malicious infrastructure. The document also displays a fake CAPTCHA, further indicating a deceptive user experience designed to trick users into clicking malicious links or performing actions that lead to compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/easy-points-gg-game-hack In PDF document text
    • http://www.imwd.it/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D69 25564 bytes
SHA-256: b70c2ff3f1513fd1f9a21fea3815f3599bb4d99b9b6027770bd01187844029ef
font_01_sfnt_off000078b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B2 18416 bytes
SHA-256: 6b06496f0627e98e9956adf732d3f0c6c832a89297aef51d4a43ce0d20a27fb4

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